| GB/T1275-94 项目ltem 分析纯 化学纯 (AR) (CP) 含量Assay,% ≥99.5 99 pH(50g/L溶液,25℃)pH of water solution 3.0~3.5 3.0~3.5 澄清度试验Clarity 合格 合格 水不溶物lnsoluble matter in water,% ≤0.005 0.01 氯化物(Cl)Chloride,% ≤0.0005 0.004 铵盐(NH4)Ammonium salt,% ≤0.005 0.01 砷(As)Arsenic,% ≤0.00005 0.0001 钠(Na)Sodium,% ≤0.02 0.05 铁(Fe)Iron ,% ≤0.001 0.002 重金属(以Pb计)Heavy metals,% ≤0.0005 0.002
项目名称 ACS Grade 含量[ALK(SO4)2)•12H2O]Assay 98.0-102.0% 水不溶物Insoluble matter ≤0.005% 铵盐(NH4)Ammonium ≤0.005% 重金属(以Pb计)Heavy metals(as Pb) ≤0.001% 铁(Fe)Iron ≤0.001% 钠(Na)Sodium ≤0.02% |